Now that the Mac App Store has been snuck installed onto your machine alongside Mac OS X 10.6.6, you might be wondering - is there some way to remove that monstrosity of an application from my Mac? While it's not officially supported, it does seem like Apple has taken this scenario into account.

The store allows you to install apps with no need to worry about serial keys, migration to other Macs you might have, the install process, upgrades and so on. What more could you want? (You know MS are hard at work trying do the same thing - I hope so anyway).

If you want to see ugly, run a lot of Java Apps on the Mac, esp. those ported from other platforms.

I think the UI works quite well and is obviously designed to be kept to a minimum. As for consistency, if I remember correctly, the Mac App Store is designed with 10.7 in mind, so if anything, you will have a taste of what is to come now (just like FaceTime)

The only concern I have is if this will become the *ONLY* way to install apps onto a Mac but to be honest, I'm not too worried about that.

"App, as a short form for "application", has been used since dinosaurs roamed the computer.
Visicalc and Lotus 1-2-3 were often called the first "killer apps" for MS-DOS, and ever since Linux appeared on the desktop people have been complaining about the lack of "killer apps".
The only thing it has to do with "app store" is that the a-s is a method for distributing app(lication)s.